PDF Output: Option to control title of generated Table of Contents

Fixes #1245076 [[Enhancement] Add PDF TOC Title, More Margin Options and ePub TOC Heading 1](https://bugs.launchpad.net/calibre/+bug/1245076)
Ebook viewer: remember inspector windows size

E-book viewer: Remember the size of the "Inspect" window used to examine
the book's code. Fixes #1245068 [Feature request: web inspector window size and font size](https://bugs.launchpad.net/calibre/+bug/1245068)
Driver for Lenovo IdeaPad

Fixes #1244857 [Lenovo android ideatab tablet not recognized](https://bugs.launchpad.net/calibre/+bug/1244857)